Method eor grinding rolls



Feb. 22.1927. 1,618,942 A. D? OB R|EN ET AL METHOD FOR GRINDING ROLLSFiled June 50,. 1926 2. Sheets-Sheet 1 Fen] 22-; 1927. 1,618,942

.A. D. OBREEN ET AL METHOD FOR GRINDING ROLLS Filed June 30, 1926 2Sheets-Sheet 2 Patented Feb. 22, 1927.

UNITED STATES PATENT OFFICE.

ARTHUR D. OBRIEN AND DELBERT B. GEESEMAN, OF CANNONSBURG, PENNSYLVANIA,ASSIGNORS T CONTINENTAL CAN 00., INC., OF NEW YORK, N. Y., A CORPORATIONOF NEW YORK.

METHOD FOR GRINDING ROLLS.

Application filed June 30, 1926.

The invent-ion relates to a new and useful method of reducing orremoving the bearings from the rolls of a sheet rolling mill.

An object of the invention is to provide a method of reducing orremoving the bearings forming on the rolls during the rolling of thesheets whereby the bearings can be ground off by rotating grindingwheels while the rolls are idly turning in the mill and with littleinterruption to the operation of the mill.

In the drawings which show one form of apparatus for practicing themethod Figure 1 is a vertical sectional view through a sheet and tinplate mill, adjacent the left-hand housing of the mill, and showing inside view the grinding wheel and the means for supporting and operatingthe same, said view showing in dotted lines the grinding wheel shiftedforoperation upon the lower roll of the mill;

Fig. 2 is a horizontal sectional view through the mill, and showing inplan view the grinding apparatus used in grinding the bearings at bothends of the rolls, and

Fig. 3 is a detail showing in section the manner of mounting thegrinding wheel on its operating shaft.

The invention is directed broadly to a method of reducing or removingthe bearings formed on the ends of the rolls of a sheet and tin platemill. It is well-known that during the rolling of sheets in mills of theabove type. that the rolls wear at the region where the rolls makecontact with the sheet, and this wearing of the rolls soon brings abouta condition wherein the rolls must be removed and redressed. Appli cantsinvention is directed particularly to a method for removing or reducingthese hearings without removing the rolls from the mill. This isaccomplished by means of a rotated grinding wheel which is so mountedthat "it may be moved freely either against 5 the roll or along theroll, and the bearing ground or reduced at the extreme end of the roll.The ends of the roll are, of course, close up to the housing or endsupports for the rolls and the bearings must be ground or reduced to theextreme end of the roll,

as noted, and this necessitates the grinding wheel being arranged andoperated so as to abradingly engage said roll immediately adjacent itsend support. The grinding wheel Serial No. 119,633.

is manually controlled in all its horizontal movements, and thus it isthat the grinding action may be restricted to the area where the rollmust be reduced. By this manual control of the grinding wheel, thebearings may be quickly reduced so that the entire reducing of thebearing may be accomplished before the roll has lost its heat, and thusthe operation of the roll is not interfered with, and furthermore, therolls of the mill are retained in proper condition to go on with thework. This is accomplished by providing a support which is preferablysupported from a traveling crane, so that the apparatus is portable andreadily, taken from one mill to another. The support is also so mountedon the traveling crane that said support may be moved in any horizontaldirection, so that the grinding apparatus is under the control of theoperator as to the region where the grinding is to take place, and alsoas to the extent of grinding. The grinding wheel is mounted on thesupport so that no part of the support extends beyond the side face ofthe grinding wheel in the region of the grinding wheel, and therefore,the grinding wheel can be moved along the roll of the tin plate mill,and grinding effected to the extreme end of the roll without anyinterference from the housing of the mill which projects in front of theroll. In view of this arrangement of the grinding wheel, we prefer touse two grinding devices, which are made right and left, that is, thegrinding wheel is on the right of one support and on the left of theother support, and by the use of these two devices, the bearings may beground at both ends of the roll at the same time. This is another way inwhich the time required for reducing the bearing is reduced to aminimum.

By our improved method, the rolls of the mill may be reduced soefliciently and so quickly that the mill may be used substantiallycontinuously throughout the entire weeks work.

It is well recognized mill practice to change the width of the sheet androll a narrower sheet after the bearings are formed, or otherwise animperfect sheet would be rolled. By our improved method after thebearings are reduced or removed, it is possible to continue the rollingof sheets of the is a well-known term in this art.

two cooperating rolls 2 and 8,0ne of which is positively driven and theother of which is driven by frictional contact w th tl e driven roll ofaplate which 18 passing between the rolls. This tin plate mill. and therolls are of the usual character. When rolling steel plates for reducingthe thickness thereof, bearings form on the rolls as indicated at 1 and5 in the drawings. These bearings are caused by reason ofthe fact thatthe metal plate'being rolled is of less width than the'length of theroll, and as these plates go through one after another, the rolls Wearin the region where they make contact with the plates. At the ends ofthe rolls where the plates do not make contact,

the roll is not worn away, and the part which remains is referred to asthe bearing. This The apparatus consists of two grinding devices 6 and7. These grinding devices are similar in construction, except that theyare right and left-handed as will be referred to more fully hereinafter.The grinding devices are supported from an overhead crane which iscapable of being moved from one part of the 2 mill to another, so thatthe grinding devices may be thus transferred from one mill to another.Each grinding device is supported by a flexible member "8 preferably inthe form of a chain.' Each grinding device consists of a support 9inwhich is mounted a shaft 10. V A motor 11 mounted on thesupport Sisconnected to the shaft and operates "to rotate the shaft. Attached tothe-support 9are hand grips 12, 1.2 which enable the ope eratorto swingthe support either laterally or endwise, or in any di recti-on'in ahorizontal plane. On the end of the support 9 is a supporting bracket13. The shaft 10 extends through this supporting bracket 13 and isprovided with a bevel gear 14. Mounted in suitable bearings in thebracket 13 is a cross shaft 15. On the cross shaft 15 is a bevel gear 16which meshes withthe bevel gear 14. Thus it is that the shaft 10 impartsrotation to the shaft 1 5. Mounted on the outer end of the shaft 15 isa, grinding wheel 17. Said grinding wheel 17 is provided with acylindrical grinding surface 18 and is also provided with a recess 19.On the shaft 15 is a washer or supportingplate 20. The shaft 15 extendsthrough the grinding wheel and in therecess 19 is a Washer or plate 21.A nut 22 is threaded on to the end of theshaft 15, and said nut clampsthe plate 21 against the outer face of the grinding wheel. and forcesthe grinding wheel against the plate 20, and thus it is that thegrinding wheel is firmly secured to the shaft 15. It will be noted thatthe nut 22, and in fact, the end of the shaft 15, is inside the outerplane or face of the grinding wheel 17. The only difference between thetwo devices shown in Fig. 2 is that the grinding wheel 17 is mounted onthe right-hand end of the shaft 15 in one apparatus, and is mounted onthe left-hand. end of said shaft in the other apparatus, as viewed-bythe operator when operating said devices. The hand grips 12 enable theoperator to move the grinding wheel at will back and forth lengthwise ofthe roll, and across the bearing formed thereon at oneend of the roll"The grinding wheelcan be moved back and forth in the region where thebearing is formed without subjecting the remainder of the rollto anygrinding action. The grinding wheel can be pressed against the roll asthe bearingis groundaway, andthus it is that the hearing at the end ofthe roll may be quickly ground off. Inasmuch the outer face of thegrinding wheel is free from any projections, 'the grinding wheel may bemoved along the roll of the tin plate mill to the extreme end thereofwith out interference from'the housing 1 in which the rolls are mounted;.7 I

Mounted on the bracket 13 is'a shield23 which is secured thereto bysuitable bolts 24:.

This shield is so shaped and positioned that the forward side of thegrinding Wheel is exposed, and the grinding wheel is, therefore,a'bradingly engageable' with the bearings on the rolls. V

The method of reducing andremoving the bearings formed on the. rolls ofa sheet and tin plate mill immediately adjacent the end supports for therolls consists insubjecting the hearings on first one'roll'and then'theother, while hot,and while the rolls are rotating idly in the mill, to arotating grinding wheel having the grinding face thereof exposed so thatthe grinding wheel 'is abradingly engageable with the rolls immediatelyadjacent its end'support and freely moving said grinding wheelradial ly0f the roll into engagement with the bearing and longitudinally of theroll across the bearing until it is removed. In its preferred form, the

method consists in'the use of two rotating grinding wheels, havingtheirgrinding facesexposed so as to form rightfand left-hand grinding wheels,and abradingly engaging the bearings on one ofthe rolls simultanesously, but ind ependentl y, u'ntil'sai d bearings are removed and theroll reducedto normal condition for rolling slieets,;and then subjectingthe bearings onthe other roll to the grinding wheels in like manner,until said' bearings are reduced, and said roll restored to normalcondition for rolling sheets. This can be accomplished in a very shortperiod of time, owing to the fact that the shifting of the grindingwheel may be done at will, and only that part of the roll which isnecessary to be removed is ground. By this method of removing thebearings, the plate rolling mill may be operated on plates of a maximumWidth, or of the same width throughout the entire operating period, andfurthermore, the bearings may be removed occasionally during theoperating period so quickly as to cause very little interference in thecontinued operation of the rolling mill.

Having thus described the invention, what we claim as new and desire tosecure by Letters-Patent, is

1. The method of reducing and removing the bearings formed on the rollsof a sheet and tin plate mill immediately adjacent the end supports forsaid rolls during the rolling of the sheets, consisting in subjectingsaid hearings on first one roll and then the other, while hot, and Whilethe rolls are rotating idly in the mill to a rotating grinding wheelmounted for free manual movement radially of the roll and longitudinallyof the roll, and abradingly engageable with said roll immediatelyadjacent its end support, whereby said grinding wheel may be moved backand forth, at will, across a hearing until the bearings are removed andthe roll restored to a normal condition for rolling sheets. a

2. The method of reducing and removing the bearings, formed on the rollsof a sheet and tin plate mill immediately adjacent the end supports forsaid rolls, consisting in supplying two rotated grinding wheels, havingthe grinding faces thereof exposed so as to form right and left-handgrinding wheels, abradingly engageable with said rolls immediatelyadjacent its end supports, and mounted adjacent the mill for freeinclependent manual movement radially of the roll and longitudinally ofthe roll, whereby said grinding wheels can be moved back and forth, atwill, across the bearings at the ends of the roll until said bearingsare removed and the roll restored to normal eondition for rollingsheets.

In testimony whereof, we aflix our signatur-es.

ARTHUR D. OBRIEN. DELBERT B. GEESEMAN.

